:root {
    --primary-color: #1e1e2f; /* 深蓝色背景 */
    --secondary-color: #2c2c3e; /* 深紫红色辅助背景 */
    --accent-color: #39FF14; /* 霓虹绿 */
    --highlight-color: #00BFFF; /* 电光蓝 */
    --text-color: #ffffff; /* 白色文字 */
    --border-color: #444444; /* 边框颜色 */
    --font-family: 'Roboto Mono', monospace;
    --transition-speed: 0.3s;
  }

  body {
    margin: 0;
    padding: 0;
    display: flex;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    font-family: var(--font-family);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
  }

  .sidebar {
    width: 250px;
    background-color: var(--secondary-color);
    padding: 20px;
    box-sizing: border-box;
    position: fixed;
    height: 100%;
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
  }

  .sidebar h1 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--accent-color);
    text-align: center;
  }

  .sidebar a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    margin: 15px 0;
    padding: 10px;
    border-radius: 4px;
    transition: background var(--transition-speed);
  }

  .sidebar a:hover {
    background-color: var(--accent-color);
    color: #000;
  }

  .main-content {
    margin-left: 250px;
    padding: 20px;
    overflow-y: auto;
    height: 100vh;
    box-sizing: border-box;
    background: rgba(30, 30, 47, 0.9);
  }

  .main-content h2, .main-content h3 {
    color: var(--highlight-color);
    margin-top: 20px;
  }

  .main-content p {
    line-height: 1.6;
    margin: 15px 0;
    color: var(--text-color);
  }

  .main-content pre {
    background: #2c2c3e;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
  }

  .main-content code {
    color: var(--accent-color);
    font-family: 'Courier New', Courier, monospace;
  }

  .main-content img {
    width: 100%;
    max-width: 320px;
    height: auto;
    margin: 10px 0;
    border-radius: 8px;
  }

  .example-article {
    border: 2px solid var(--highlight-color);
    padding: 20px;
    border-radius: 10px;
    background: rgba(44, 44, 62, 0.8);
    margin-top: 40px;
  }

  .example-article h2 {
    text-align: center;
    color: var(--accent-color);
  }

  .loader {
    border: 8px solid #f3f3f3;
    border-top: 8px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  .button {
    background-color: var(--accent-color);
    color: #000;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background var(--transition-speed), transform var(--transition-speed);
  }

  .button:hover {
    background-color: var(--highlight-color);
    transform: scale(1.05);
  }

  .visual-impact {
    background: radial-gradient(circle, rgba(255,87,34,0.8), transparent);
    animation: aurora-move 15s linear infinite;
    height: 200px;
    border-radius: 50%;
    margin: 20px 0;
  }

  @keyframes aurora-move {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
    100% { transform: translateY(0) rotate(360deg); }
  }

  /* Responsive Design */
  @media (max-width: 1440px) {
    .sidebar {
      width: 220px;
    }
    .main-content {
      margin-left: 220px;
    }
  }

  @media (max-width: 1200px) {
    .sidebar {
      width: 200px;
    }
    .main-content {
      margin-left: 200px;
    }
  }

  @media (max-width: 1024px) {
    .sidebar {
      width: 180px;
    }
    .main-content {
      margin-left: 180px;
    }
  }

  @media (max-width: 768px) {
    .sidebar {
      position: fixed;
      bottom: 0;
      width: 100%;
      height: 60px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      border-right: none;
      border-top: 1px solid var(--border-color);
    }

    .sidebar h1 {
      display: none;
    }

    .sidebar a {
      margin: 0;
      padding: 0;
    }

    .main-content {
      margin-left: 0;
      padding: 10px;
    }
  }

  @media (max-width: 480px) {
    .main-content h2 {
      font-size: 20px;
    }
    .main-content h3 {
      font-size: 18px;
    }
    .main-content p {
      font-size: 14px;
    }
    .button {
      font-size: 14px;
      padding: 8px 16px;
    }
  }

  @media (max-width: 320px) {
    .main-content {
      padding: 5px;
    }
    .main-content h2 {
      font-size: 18px;
    }
    .main-content h3 {
      font-size: 16px;
    }
    .main-content p {
      font-size: 12px;
    }
    .button {
      font-size: 12px;
      padding: 6px 12px;
    }
  }